Easy Way to Biscuit-join Edgebanding

I edge-band plywood shelves with solid wood, attaching the edge-banding with #20 biscuits. It’s no problem at all to hold the plywood shelf solidly while cutting the slot; that’s what bench dogs and an end vise do so well. But the edgebanding itself can be a little squirmy, either bending or rotating when held between dogs or slipping if held by the ends in a vise.